From 78d7d512cbef31144106c05cfcc0ade7dcfad6fc Mon Sep 17 00:00:00 2001
From: Maxime Coste <mawww@kakoune.org>
Date: Sun, 8 Oct 2017 09:28:23 +0800
Subject: [PATCH] Fix utf8::to_previous that could go before the begin iterator

---
 src/utf8.hh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/utf8.hh b/src/utf8.hh
index 68d0b48d..4d4de274 100644
--- a/src/utf8.hh
+++ b/src/utf8.hh
@@ -157,7 +157,7 @@ void to_previous(Iterator& it, const Iterator& begin) noexcept
 {
     if (it != begin)
         --it;
-    while (not is_character_start(*it))
+    while (it != begin and not is_character_start(*it))
         --it;
 }
 // returns an iterator to the previous character first byte